[PATCH v3 08/20] testpmd: add csum parse_tunnel command

[Olivier Matz <olivier.matz-pdR9zngts4EAvxtiuMwx3w@public.gmane.org>]

Add a new command related to csum forward engine:

  csum parse-tunnel (on|off) (tx_port_id)

If enabled, the tunnel packets received by the csum forward engine are
parsed and seen as "outer-headers/inner-headers/data".

If disabled, the parsing of the csum forward engine stops at the first
l4 layer. A tunnel packet is seens as "headers/data" (inner headers are
included in payload).

Note: the port argument is the tx_port. It's more coherent compared
to all other testpmd csum flags.

Signed-off-by: Olivier Matz <olivier.matz-pdR9zngts4EAvxtiuMwx3w@public.gmane.org>
---
 app/test-pmd/cmdline.c  | 66 +++++++++++++++++++++++++++++++++++++++++++++++++
 app/test-pmd/csumonly.c |  3 ++-
 app/test-pmd/testpmd.h  |  5 +++-
 3 files changed, 72 insertions(+), 2 deletions(-)

diff --git a/app/test-pmd/cmdline.c b/app/test-pmd/cmdline.c
index 55768f1..f57bf0b 100644
--- a/app/test-pmd/cmdline.c
+++ b/app/test-pmd/cmdline.c
@@ -327,6 +327,12 @@ static void cmd_help_long_parsed(void *parsed_result,
 			" the forward engine)\n"
 			"    Please check the NIC datasheet for HW limits.\n\n"
 
+			"csum parse-tunnel (on|off) (tx_port_id)\n"
+			"    If disabled, treat tunnel packets as non-tunneled"
+			" packets (treat inner headers as payload). The port\n"
+			"    argument is the port used for TX in csum forward"
+			" engine.\n\n"
+
 			"csum show (port_id)\n"
 			"    Display tx checksum offload configuration\n\n"
 
@@ -2889,6 +2895,8 @@ csum_show(int port_id)
 	uint16_t ol_flags;
 
 	ol_flags = ports[port_id].tx_ol_flags;
+	printf("Parse tunnel is %s\n",
+		(ol_flags & TESTPMD_TX_OFFLOAD_PARSE_TUNNEL) ? "on" : "off");
 	printf("IP checksum offload is %s\n",
 		(ol_flags & TESTPMD_TX_OFFLOAD_IP_CKSUM) ? "hw" : "sw");
 	printf("UDP checksum offload is %s\n",
@@ -3011,6 +3019,63 @@ cmdline_parse_inst_t cmd_csum_show = {
 	},
 };
 
+/* Enable/disable tunnel parsing */
+struct cmd_csum_tunnel_result {
+	cmdline_fixed_string_t csum;
+	cmdline_fixed_string_t parse;
+	cmdline_fixed_string_t onoff;
+	uint8_t port_id;
+};
+
+static void
+cmd_csum_tunnel_parsed(void *parsed_result,
+		       __attribute__((unused)) struct cmdline *cl,
+		       __attribute__((unused)) void *data)
+{
+	struct cmd_csum_tunnel_result *res = parsed_result;
+
+	if (port_id_is_invalid(res->port_id)) {
+		printf("invalid port %d\n", res->port_id);
+		return;
+	}
+
+	if (!strcmp(res->onoff, "on"))
+		ports[res->port_id].tx_ol_flags |=
+			TESTPMD_TX_OFFLOAD_PARSE_TUNNEL;
+	else
+		ports[res->port_id].tx_ol_flags &=
+			(~TESTPMD_TX_OFFLOAD_PARSE_TUNNEL);
+
+	csum_show(res->port_id);
+}
+
+cmdline_parse_token_string_t cmd_csum_tunnel_csum =
+	TOKEN_STRING_INITIALIZER(struct cmd_csum_tunnel_result,
+				csum, "csum");
+cmdline_parse_token_string_t cmd_csum_tunnel_parse =
+	TOKEN_STRING_INITIALIZER(struct cmd_csum_tunnel_result,
+				parse, "parse_tunnel");
+cmdline_parse_token_string_t cmd_csum_tunnel_onoff =
+	TOKEN_STRING_INITIALIZER(struct cmd_csum_tunnel_result,
+				onoff, "on#off");
+cmdline_parse_token_num_t cmd_csum_tunnel_portid =
+	TOKEN_NUM_INITIALIZER(struct cmd_csum_tunnel_result,
+				port_id, UINT8);
+
+cmdline_parse_inst_t cmd_csum_tunnel = {
+	.f = cmd_csum_tunnel_parsed,
+	.data = NULL,
+	.help_str = "enable/disable parsing of tunnels for csum engine: "
+	"csum parse_tunnel on|off <tx-port>",
+	.tokens = {
+		(void *)&cmd_csum_tunnel_csum,
+		(void *)&cmd_csum_tunnel_parse,
+		(void *)&cmd_csum_tunnel_onoff,
+		(void *)&cmd_csum_tunnel_portid,
+		NULL,
+	},
+};
+
 /* *** ENABLE HARDWARE SEGMENTATION IN TX PACKETS *** */
 struct cmd_tso_set_result {
 	cmdline_fixed_string_t tso;
@@ -9060,6 +9125,7 @@ cmdline_parse_ctx_t main_ctx[] = {
 	(cmdline_parse_inst_t *)&cmd_tx_vlan_set_pvid,
 	(cmdline_parse_inst_t *)&cmd_csum_set,
 	(cmdline_parse_inst_t *)&cmd_csum_show,
+	(cmdline_parse_inst_t *)&cmd_csum_tunnel,
 	(cmdline_parse_inst_t *)&cmd_tso_set,
 	(cmdline_parse_inst_t *)&cmd_tso_show,
 	(cmdline_parse_inst_t *)&cmd_link_flow_control_set,
diff --git a/app/test-pmd/csumonly.c b/app/test-pmd/csumonly.c
index ca5ca39..858eb47 100644
--- a/app/test-pmd/csumonly.c
+++ b/app/test-pmd/csumonly.c
@@ -373,7 +373,8 @@ pkt_burst_checksum_forward(struct fwd_stream *fs)
 		l3_hdr = (char *)eth_hdr + l2_len;
 
 		/* check if it's a supported tunnel (only vxlan for now) */
-		if (l4_proto == IPPROTO_UDP) {
+		if ((testpmd_ol_flags & TESTPMD_TX_OFFLOAD_PARSE_TUNNEL) &&
+			l4_proto == IPPROTO_UDP) {
 			udp_hdr = (struct udp_hdr *)((char *)l3_hdr + l3_len);
 
 			/* check udp destination port, 4789 is the default
diff --git a/app/test-pmd/testpmd.h b/app/test-pmd/testpmd.h
index 8f5e6c7..36277de 100644
--- a/app/test-pmd/testpmd.h
+++ b/app/test-pmd/testpmd.h
@@ -127,8 +127,11 @@ struct fwd_stream {
 #define TESTPMD_TX_OFFLOAD_SCTP_CKSUM        0x0008
 /** Offload VxLAN checksum in csum forward engine */
 #define TESTPMD_TX_OFFLOAD_VXLAN_CKSUM       0x0010
+/** Parse tunnel in csum forward engine. If set, dissect tunnel headers
+ * of rx packets. If not set, treat inner headers as payload. */
+#define TESTPMD_TX_OFFLOAD_PARSE_TUNNEL      0x0020
 /** Insert VLAN header in forward engine */
-#define TESTPMD_TX_OFFLOAD_INSERT_VLAN       0x0020
+#define TESTPMD_TX_OFFLOAD_INSERT_VLAN       0x0040
 
 /**
  * The data structure associated with each port.
-- 
2.1.4